Organic EL drive circuit with a D/A converter circuit and...

Details Organic EL drive circuit with a D/A converter circuit and... Organic EL drive circuit with a D/A converter circuit and...

2011-01-25

2011-01-25

Nguyen, Chanh (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S211000

Reexamination Certificate

active

07876297

ABSTRACT:
An organic EL drive circuit and an organic EL display device is capable of preventing sticking of a display screen of the organic EL panel due to reduction of an output current of a relatively high withstand voltage transistor of a D/A converter circuit.In particular, an analog converted current is obtained at a predetermined output terminal of a D/A converter by connecting a plurality of series-connected relatively high withstand voltage transistors between an output side of the D/A converter constructed with a current mirror circuit and an output terminal of the D/A converter and using low withstand voltage transistors as output side transistors of the D/A converter. Therefore, the output side transistors of the D/A converter can be replaced by low withstand voltage transistors similar to the input side transistors, so that the area occupied by the D/A converter can be reduced.

REFERENCES:
patent: 2003/0151567 (2003-08-01), Hanada et al.
patent: 2002-091332 (2002-03-01), None
patent: 2002-246608 (2002-08-01), None
patent: 2003-234655 (2003-08-01), None
patent: 2003-308043 (2003-10-01), None
patent: 2003-316319 (2003-11-01), None
patent: 2003-332578 (2003-11-01), None
patent: 2004-151694 (2004-05-01), None

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